Shakespeare's Sonnet 153

Cupid laid by his brand and fell asleep:A maid of Dian’s this advantage found,And his love-kindling fire did quickly steepIn a cold valley-fountain of that ground;Which borrow’d from this holy fire of Love,A dateless lively heat, still to endure,And grew a seething bath, which yet men proveAgainst strange maladies a sovereign cure.But at my mistress’ eye Love’s brand new-fired,The boy for trial needs would touch my breast;I, sick withal, the help of bath desired,And thither hied, a sad distemper’d guest,But found no cure, the bath for my help liesWhere Cupid got new fire; my mistress’ eyes.

Cupid put down his torch and fell asleep. One of Dian's maidens took advantage of this and quickly plunged his love-kindling flame into a cold spring in the valley nearby. From this sacred fire of Love, the spring gained a lasting, lively heat that would never end. It became a steaming bath, which people still find a powerful cure for unusual diseases. But Love's torch caught fire again from my mistress's eyes, and the boy insisted on testing it by touching my chest. Made sick by it, I sought help from the bath and hurried there, a sad, suffering visitor. But I found no cure. The bath that can help me lies where Cupid found fresh fire: in my mistress's eyes.